Improvement in stove-pipe dampers



UNITED STATES' ROBERT HILLSON, AOF ALBANY, NEW YORK.

IMPROVEMENT IN STOVE-PIPE DAMPERS.

To all 'whom it may concern.:

Be it known that I, ROBERT HILLsoN, of the city and county of Albany, State of New York, have invented a new and Improved Damper for Stove-Pipes, SmokeStacks, and the like; and I do hereby declare that the following is a description thereof, reference being had to the accompanying drawing forming a part of this specilication, in which- Figure lrepresents a side view ofthe damper embodying my invention. Fig. 2 is a longitudinal cross-section of the saine. Fig. 8 is a transverse sectional view. Fig. 4 is a crosssectional view, taken at line No. 1 in Fig. 1.

' My invention relates to the combination of a serrated or sinuated edge with the body of the damper, and also the arrangement of one or more induction-ports with the spindle of a hollow damper 5 and also the arrangement ot' a series of discharge-ports with the periphery of the same, whereby the air from wit-hout the pipe can be introduced within the damper to be discharged within the pipe, and the whole be made to operate more eft'ectually to regulate mthe draught of the stove or furnace.

To enable others skilled in the art to make and use my invention, I will proceed to describe it in reference to the drawing and the letters of reference marked thereon, the same letters indicating like parts.

In the drawing, A represents the damper, which consists ot' the two plates A A', each constructed with a plane concave central section, a a, surrounded by a plane section, a af, as shown in Figs. 1, 2, and 3, and so arranged that the plane surt'aces of the sections c a will be at a little distance apart while there will be a considerably larger cavity centra-l in the damper, as shown in Fig. 3. I also make with the said double plano-concave space be tween the shells A A' the duct B, which duct leads from one side of the damper to the central cavity, as shown in Figs. l and 2, and is intended to receive and conduct the air passing through the induction-ports attached to the cut-off valve made with the operating stem ofthe damper. On the periphery of the damper I make a serrated edge, c c c, as shown in Fig. 1, which serrations are intended to nearly or quite touch the inner surface of the pipe when the damper is turned horizontal; a sinuated edge could, if desired, be used as an equivalent, and either form ot' edge would operate to effect an equal distribution ofthe current or draught from the center of the pipe to the outer portion of its space or bore when the damper is turned to check the said draught. On the pe riphery of the damper and between the bases ofthe serrations I make the several dischargeports a' .fc x, Fig. l, which discharge-ports communicate with the space between the shells A A and the interior ofthe pipe to discharge the air received into the interior of the damper out between the serrations c c cin the pipe. 4

The damper is swung on the stem C from the pintle d, working in one side of the pipe, and the bearing surfaces e e c c ofthe cut-olil valve working in the opposite side of the pipe, as shown in Figs. 1 and 2, which stem is provided with a thumb-piece, D, by which it is operated. One end ot' the stem O is provided with a cut-off', E, which cut-oli' consists of the closing end piece f and the several bearing pieces c cV c radiating out from the stein G, as shownI in Fig. 4, and the band g inclosing a portion otl the apparatus between the bearings c c', as shown in Figs. l and 2. The length of the stem G from the end piece f to the pintle d is longer than the diameter ofthe pipe by about one inch, more or less, on a six-inch pipe. Attached to the pipe on the shut-oir' side is a circular collar, F, into which the closing end piece f can be made to enter. The stem G and its attached cut-ott' are capable of being pushed or drawn in either direction to the limit afforded by the increased length otl the stein over the diameter ofthe pipe, and,when pushed in direction indicated by dotted arrows in Figs. 1 and 2, the closing end piece will enter the recess of the collar F and close the end, to prevent the ent-rance of the air within the damper from without the pipe, but when the stem is drawn out, as shown in Figs. 1 and 2, the shut- A oii will be opened so as to admit the air from the outside oi' the pipe to the interior of the damper to be discharged through the ports w .fc cc, at the periphery of the damper into the pipe in a direction indicated by arrows in the several ligures. i

The manner in which the several parts of this invention operates is as follows: The damper is swung central within the pipe o1' smoke-stack l), in the manner above described,

and is capable of beingl turned vertically Within the seine, as shown in Fig. 1, when the draught of the pipe will be unchecked, (provided the cut-oftl valve is thrown forward to cause the end piece f to enter thel recess of the collar F, as shown by dotted lines 1n, Fig. 2, or the dapper ddd bd duped do ds to spddd hdddd. d dd d d d d d dddpdudiqodddpddppd'pdipd duq hyped do pppd pld Lddddd op dp@ doppi, p

idppop, idp@ i2 dpto/ip pidan] p0 cada@ pp@ or, dpe Iubo iup pe rmcpeopeq (brodiqeq dpe rpo 2.9m@ so @poum in ME.' 1 dipen cpo qrsnpp 5mg g2 cyber/)jo or pem rumor; zA oLpgoffjj /A 1,011,111 emojlG-Zps/'ojz jg. J In 0176 marmer. sfpozio qGZGLJpGCj l. The arrangement of the serrated edge c c c or equivalent sinuated edge with the damper A, whereby a checked draught will be equally distributed at the periphery of the demper to escape upward in close contact with the inner surface of the pipe, Substantially ars and for the purpose Set forth.

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